CVE-2026-28815

CWE-125 — Out-of-bounds ReadCWE-787 — Out-of-bounds Write5 documents5 sources
Severity
7.5HIGH
EPSS
0.0%
top 86.20%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Apple Macos
Timeline
PublishedApr 3

Description

A remote attacker can supply a short X-Wing HPKE encapsulated key and trigger an out-of-bounds read in the C decapsulation path, potentially causing a crash or memory disclosure depending on runtime protections. This issue is fixed in swift-crypto version 4.3.1.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages2 packages

▶SwiftURLswift-crypto4.0.0 — 4.3.1
▶CVEListV5apple/macos4.0.0 — 4.3.1

🔴Vulnerability Details

3
OSV
Swift Crypto: X-Wing HPKE Decapsulation Accepts Malformed Ciphertext Length↗2026-04-03
▶
CVEList
CVE-2026-28815: A remote attacker can supply a short X-Wing HPKE encapsulated key and trigger an out-of-bounds read in the C decapsulation path, potentially causing a↗2026-04-03
▶
GHSA
Swift Crypto: X-Wing HPKE Decapsulation Accepts Malformed Ciphertext Length↗2026-04-03
▶

🕵️Threat Intelligence

1
Wiz
CVE-2026-28815 Impact, Exploitability, and Mitigation Steps | Wiz↗
▶
CVE-2026-28815 (HIGH CVSS 7.5) | A remote attacker can supply a shor | cvebase.io